local length of a concave mirror by two-
उत्तल लेंस की सहायता से एक उत्तल दर्पण की फोकस दूरी ज्ञात करें।
Find the focal
lens.
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To determine focal length of a given concave mirror
The distance between the selected distinct object should be more than 50 ft. The concave mirror placed on the mirror stand and the distant object should be facing each other. The screen should be placed in front of the reflecting surface of the mirror..
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